(a) Probability density functions of the normalized magnetic field-line curvature, κl_c, from simulations with different δB₀/B₀. Power-law slopes κ⁺¹ and κ^−2.5 are shown for reference. (b) Probability density functions of the normalized magnetic field-line contraction, (v_E · κ)l_c/c, for the same set of simulations, with symmetric Pareto distribution fits plotted as dashed lines.